Timepiece barrel with reduced core diameter
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United States of America Patent
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Sep 29, 2015
Grant Date -
Jul 31, 2014
app pub date -
Sep 13, 2012
filing date -
Sep 15, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
Timepiece barrel assembly, including a mainspring mounted between a drum and a receiving surface of a core coaxial to this drum about an axis. The core includes in series from a first end towards a second end: a means of fixing a ratchet, and/or a first pivot shoulder in a plate; a second pivot shoulder of this drum; a collar radially projecting relative to this shoulder and resting on an inner face of the drum towards the spring; set back radially relative to the collar, the receiving surface; set back radially relative to the receiving surface, a third pivot shoulder of a cover for closing the barrel; and a fourth pivot shoulder in a plate.
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